Hydroxypropyl Methylcellulose (Hpmc), Brand Name : SIDLEY

Hydroxypropyl methyl cellulose is a kind of white or slightly yellowish powder, odorless, tasteless, and non-toxic. The product can be dissolved in cold water to form a transparent viscous solution. The aqueous solution of this product has surface activity so that it has emulsification, protective colloids and relative stability. Ph stability: the aqueous solution viscosity of this product is relatively stable in the range of ph 3.0ã¢ï¿½ï¿½11.0. As the product is non-ionic, and in the preparation process can be effectively purified by washing with hot water, it has a very low ash content. Hydroxypropyl methylcellulose products can fully meet the standards for use of medicine, food, construction and personal care products.
Physical and chemical properties
*particle size:98.5% passes through 100 mesh; 100% passes through 80 mesh.
*charring temperature: 280-300ã¢ï¿½ï¿½.
*bulk density: 0.25-0.70 gcm3 (usually around 0.5 gcm3 )
*real specific gravity:1.26-1.31.
*browning temperature: 190-200ã¢ï¿½ï¿½.
Surface tension:(2% water solution) 42-56dyn.cm.
*properties: dissolved in water and some organic solvent such as ethanol. Propyl alcohol. Ethylene chloride, the water solution is of surface activity. It is a nonionic surface active agent. Gelation temperature is different for different grades. For example, among 60rt hydroxypropyl methylcellulose, 60 is gelation temperature, namely, 2% water solution will form gelation at 60%.